The 1960s Sylvania 12AU7A tubes in this precisely matched pair were made in the USA. They have halo getters and long gray plates with copper grid posts. Both tubes test as new with very low noise. Click "more info" for current availability.

This early 1960s 12AU7A tube was made by Sylvania and labeled for Hammond or Baldwin organs. It has long gray plates with copper grid posts and a halo getter. Click "more info" for current availability.